[AVR] Help with led message board

[codename25]

Hi,
I'm building an led display board. I'm confused about the type of Led used in display board. Other than high bright led which type of led should i use? Should i use the the transparent (glass) type or the colored(diffused) one? i'm planning to give red led. Thanks in advance.

 

[FvM]

You'll primarly look for luminous intensity and viewing angle of the LEDs. LEDs with diffused package have usually a wider viewing angle and lower luminous intensity.

Besides the effect of different viewing angle, there's a large range between low efficiency standard LEDs and super bright LEDs.

 

[codename25]

Thanks fvm, so it is preferable to use diffused type over glass type. I have another doubt does high before led also have high intensity?

 

[kam1787]

............does high before led also have high intensity?

I do not understand. Did you miss a word? or make a typo?

 

[codename25]

Yeah. It's high bright led not " high before led".

 

[kam1787]

That makes more sense, but I think you really need to clarify on what the terms means;

http://en.wikipedia.org/wiki/Luminous_intensity
http://en.wikipedia.org/wiki/Brightness
**broken link removed**
and this might help
http://www.jameco.com/Jameco/workshop/techtip/light-brightness-intensity.html